package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * @description:新增菜品
     * @author: yanhongwei
     * @date: 2023/5/23 11:50
     * @param: [dishDto]
     * @return: com.itheima.reggie.common.R<java.lang.String>
     **/
    @CacheEvict(value = "reggie",key = "'dish_'+#dishDto.categoryId+'_1'")
    //表示删除全部缓存
//    @CacheEvict(value = "reggie",allEntries = true)
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

//        清理某个分类下面的菜品缓存数据
//        String key="dish_"+dishDto.getCategoryId()+"_1";
//        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * @description:菜品信息分页查询
     * @author: yanhongwei
     * @date: 2023/5/24 10:54
     * @param: [page, pageSize, name]
     * @return: com.itheima.reggie.common.R<com.baomidou.mybatisplus.extension.plugins.pagination.Page>
     **/
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){

        //构造分页构造器对象
        Page<Dish> pageInfo=new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records=pageInfo.getRecords();

        List<DishDto> list=records.stream().map((item)->{
            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId=item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category=categoryService.getById(categoryId);
            String categoryName = category.getName();
            dishDto.setCategoryName(categoryName);

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * @description:根据id查询菜品信息和对应的口味信息
     * @author: yanhongwei
     * @date: 2023/5/24 17:13
     * @param: [id]
     * @return: com.itheima.reggie.common.R<com.itheima.reggie.dto.DishDto>
     **/
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto=dishService.getByIdWithFlavor(id);

        return R.success(dishDto);

    }

    /**
     * @description:修改菜品
     * @author: yanhongwei
     * @date: 2023/5/23 11:50
     * @param: [dishDto]
     * @return: com.itheima.reggie.common.R<java.lang.String>
     **/
    @CacheEvict(value = "reggie",key = "'dish_'+#dishDto.categoryId+'_1'")
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);
        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

//        清理某个分类下面的菜品缓存数据
//        String key="dish_"+dishDto.getCategoryId()+"_1";
//        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    /**
     * @description:根据条件查询对应的菜品数据
     * @author: yanhongwei
     * @date: 2023/5/25 14:35
     * @param: [dish]
     * @return: com.itheima.reggie.common.R<java.util.List<com.itheima.reggie.entity.Dish>>
     **/
    @Cacheable(value = "reggie",key = "'dish_'+#dish.categoryId+'_1'",unless = "#result==null")
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){

        List<DishDto> dishDtoList=null;

     /*   String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();

        //先从redis中获取缓存数据
        dishDtoList= (List<DishDto>) redisTemplate.opsForValue().get(key);

        if(dishDtoList!=null) {
            //如果存在,直接返回,无需返回数据库
            return R.success(dishDtoList);
        }*/


        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList=list.stream().map((item)->{

            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId=item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category=categoryService.getById(categoryId);
            String categoryName = category.getName();
            dishDto.setCategoryName(categoryName);

            Long dishId = item.getId();

            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper=new LambdaQueryWrapper<>();

            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);

            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());


        //如果不存在，需要查询并缓存到Redis
//        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


}
